Ore-crusher



(No Model.) 2 Sheets-Sheet 1. J. M. BRYAN. ORE CRUSHBR Patented Sept. 2,1890.

77 Lin/asses:

(No Model.) 2 Sheets-Sheet 2.

J. M. BRYAN. ORE ORUSHER.

No. 435,622. Patented Sept. 2, 1890 Wblblesses UNITE STATES PATENTOFFICE.

JOHN M. BRYAN, OF sAN FRANCISCO, ASSIGNOR OF'ONEIIALF 'ro r. A. DOANE,OF OAKLAND, CALIFORNIA.

ORE-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 435,622, datedSeptember 2, 1890.

Application filed March 20, 1886.

To all whom it may concern.-

Be it known that I, JOHN M. BRYAN, of San Francisco, in the county ofSan Francisco and State of California, have invented certain new anduseful Improvements in Ore- Orushers, of which the following is aspecification.

The invention consists in the novel construction and combination ofparts hereinafter described, and pointed out in the claim.

The following description explains the na ture of my said improvementsand the manner in which I produce and combine them in the constructionof roller-mills.

The accompanying drawings being referred to by letters, Figure 1 is across-section taken vertically through the mortar, the revolving centerplate, and the driving pulley or drum of a mill constructed according tomy invention. Fig. 2 is a plan of the mortar with the annular die, therevolving plate, and crushing-rollers in place, the driving-pulley beingtaken oif. Fig. 3 is a plan view of the mortar. Fig. 4 is a perspectiveview of scraper. Fig. 5 is an enlarged View of the means of attachingthe scraper to the revolving bed. Fig. 6 is a detail view showing themanner in which the scraper is applied.

Similar letters of reference indicate corresponding parts in all theviews where they occur.

A is the base of the mill, and B the mortarblocks, to which parts theannular mortar J is bolted.

The mortar is made with divergent walls, the inner wall being lower thanthe outer wall. The outer wall is provided with screened openings n, anda trough or channelo is provided outside thereof just below the openings72. In the bottom of the mortar is laid a steel die M, the sides ofwhich are perpendicular and stand a distance from the mortar-walls oneach side. The base of the die may be broadened out to fill the bottomof the mortar. The die is made in sections, as shown in Figs. 3 and 6.

Upon the die M the crushing and grinding rollers F are caused to turn byhaving spindles e fixed in them and held with freedom to revolve inboxes f upon a revoluble plate or Serial No. 196,027. (No model.)

table g. The spindles e have collars s and r, the former adapted to rideupon the edge of table 9 and the latter being placed upon the inner endof the spindle. The plate 9 revolves with the rollers in their circularprogression upon die M upon an upright post E, which is held in a hub isin the bed-plate of the mortar by means of a key Z, and also passesthrough and is held by a spider z', secured at the top of the inner wallof the mor tar. The drum or pulley G rests upon the rollers F androtates them by frictional contact, being provided for this purpose witha wearing-plate c, bolted to the base D of the drum, as shown at c. Thepulley or drum is centered upon the top of post E, and is provided witha cap g, from which an Oil-tube p extends to the top of the drum. A bandI) transmits power to the drum from any suitable source.

Oil-cups h may be provided upon the spindle-boxes f.

A very important feature of my said improvements is the yielding scraperfor keeping the die clean. Ithas the qualityof springing or yieldinglaterally both inwardly or away from the side of the mortar andoutwardly or away from the surface of theconical center of the mortar,and it is capable also of adjustment in several directions, by which itcan be set to run more closely to either inclined side of the trough, aswell as to have greater or less pressure upon the face of the die. Suchaction and adjustments are secured by attaching the scraping-blade II toone end of a spring-arm I, which is produced by bending a flat bar inthe middle over upon itself and then bending laterally outward the uppermember and bending the end of the lower member in a curve downward totake the scraper? The arm I is bolted to the scraper H at its lower end,as shown at t, and is provided with an elongated transverse slot at apoint above this, through which a bolt 24 is passed to adjust and setthe 5 scraper at any inclination upon the arm I.

At the upper end the arm I is provided with an Opening at o, throughwhich a bolt passes, and a slot at w, through which another bolt passesfor the purpose of adjustment at this point. The spring arm or strap isset upon blocks cc y to bring it over the edge 9' of plate g. Underordinary conditions of work the spring-arm will hold the scraper down tothe die and in position over it; but when large pieces of ore get inbetween the upright edge of the scraper and the side of the'trough thearm will spring and allow the scraper to pass the obstruction. Bybearing with suitable pressure upon the face of the die the bottom edgesof the scrapers keep the die continually clean, and consequently no pulpwill adhere to the rollers as they-travel around the die. The scrapersserve also to facilitate the discharge of the pulp through the screens,and they operate to distribute the ore con1- ing in from the feeder andto equalize it upon and around the annular die.

In the operation of the mill the pulp runs around the mortar next to thescreens in a rapid current, while toward the center the movement is muchless rapid, and the gold liberated from the matrix by the crushingoperation tends to fall to the eddy side of the current and to settle tothe bottom of the trough around the center conical portion of themortar, where it escapes the continuous grinding action of the rollers.Nearly all the gold contained in the ore will be found to be retained inthe mortar, and owing to the simple construction and arrangement of theparts free access is had to the trough for cleaning up. The water forthe mortar is brought through supply-pipe a and conducted into themortar at different points by the branch pipes a.

I do not claim the scrapers, broadly, in this application, having madethem the subjectmatter of a separate application for patent filed on the31st day of July, 1890, Serial No. 360,605.

Having thus described my invention, What I claim, and desire to secureby Letters Patent,

In a quartz-mill, the combination-of mortar J, openings 02, die M, postE, table g, centered thereon and provided with boxes, rollers F,journaled in said boxes, scrapers H, springarms I, bent as described andprovided with openings v and slots u to, so that they may be adjustablysecured to the table and the scrapers adj ustably secured to the arms,and drum 0, centered on post E and resting on rollers F, substantiallyas described.

JOHN H. BRYAN. [L. s]

Witnesses:

ALPHONSO B. SMITH, FERDINAND IMHORST.

